The present invention relate to a method, an apparatus, and a terminal for wireless network connection. The method includes: acquiring lowest transmit power of a communication terminal that establishes connection with a wireless network access point, where the lowest transmit power is minimum transmit power that can ensure connection and communication between the communication terminal and the wireless network access point; and adjusting and determining transmit power of the communication terminal according to the lowest transmit power. With the implementation of the embodiments of the present invention, the communication terminal automatically reduces transmit power without affecting normal network connection, so that manual setting by users is avoided, electrical energy is saved, radiation is reduced, and convenient network access by users is ensured.